轨道交通是现代城市的血脉，上海市民在评价城市管理服务的温馨度、精细度时，最直接的感受就来自地铁出行。如今，上海地铁已经走过了三十而立后的第一个年头，围绕“高质量”这个关键词，通号分公司作为业内唯一一家集建设与维护为一体的通号运维企业，紧密结合业务实际需求，明确了自身高质量发展的路径与目标，即：以高质量的规划为引领，落实高质量的建设和高质量的维护，力争实现“无感运营”的目标。

基于对新技术、新需求的研究和思考，通号分公司在“十四五”初期即制定了符合超大规模网络要求的专业演进规划，包括高性能、高可靠、标准化的增强型信号系统，以及高性能、线网化、扁平化的通信系统，并形成了专业发展白皮书来指导后续的大修更新改造及维护维修工作，从而全面提升通号板块的建设和维护保障能力。伴随着“十四五”规划的逐步推进，我们在大修更新改造和日常维护中也遇到了以下挑战。

一是新技术的推广应用。例如，TACS（基于车车通信的列车自主运行系统）、BLS（基于信标的次级定位）等会对系统架构、运营场景、外部接口、功能要求等带来不同程度的影响，因此大量设计和实施方案需要细化研究。

二是新的运营需求不断涌现。例如，正线过夜存车、降低列车打滑后的运营影响、节能减排等新需求，要求在设计方案时既要考虑对需求响应的快速性，又要考虑和规划的一致性。

三是如何利用数据来提升维护能力。数字化转型正在如火如荼地展开，对于基础设备状态的全面监测也已在大修更新改造中落地，但如何利用收集到的数据来提升维护能力，特别是在转辙机维护、电源维护、无线环境监测等重点难点领域还有很多问题值得探讨。

针对上述实践过程中遇到的问题，通号分公司逐项梳理，并联合设计院、系统集成商、施工单位进行深入分析和重点研究，形成了一系列可实施的方案。在此以论文集的形式汇总研究的成果，希望能够藉此为大修更新改造团队提供有针对性的解决方案, 对进行日常维护的一线员工赋能，打通规划落地的“最后一公里”，从而推动生产服务全面提质增效，助力上海轨道交通高质量发展，为行业繁荣添砖加瓦。

Rail transit isthe lifeblood of modern cities. For Shanghai residents, the most directexperience of the city′s management service quality such as coziness andfineness comes from their metro travel. Now, as Shanghai Metro enters itsfourth decade, centered on the key word of ′high-quality′, the Telecom &Signal Branch, the only company in the industry that integrates constructionand maintenance of signaling operations, has defined its path and goals forhigh-quality development through closely combining business practicalrequirements. This is reflected as, guidance by high-quality planning,implementation of high-quality construction as well as maintenance, strivingfor the goal of ′seamless operation′.

Based onresearch and consideration of new technologies and demands, the Telecom &Signal Branch formulated a professional evolution plan at the beginning of the14th Five-Year Plan that complies with the requirements of a large-scalenetwork, including high-performance, high-reliability, standardized enhancedsignaling systems, as well as high-performance, networked, and streamlinedcommunication systems. A professional development white paper was formulated toguide subsequent major overhauls, updates, and maintenance work, therebycomprehensively enhancing the construction and maintenance capabilities of thetelecom & signal sector. As the 14th Five-Year Plan progresses, thefollowing challenges are encountered in major overhauls, updates, and dailymaintenance.

Firstly, thepromotion and application of new technologies, such as TACS (train autonomouscontrol system based on vehicle-to-vehicle communication) and BLS (beacon-basedsecondary localization system), will impact system architecture, operationalscenarios, external interfaces, and functional requirements to varying degrees.Therefore, detailed research on design and implementation plans is necessary.

Secondly, newoperational demands are constantly emerging. For example, overnight storage oftrains on main lines, reducing the operational impact of train slippage, andenergy conservation and emission reduction. These new demands require designplans to consider both the responsiveness to these needs and consistency withoverall planning.

Thirdly, how toutilize data to enhance maintenance capabilities. Digital transformation is infull swing, and comprehensive monitoring of the status of basic equipment isimplemented in major overhauls and updates. However, there are still many issuesto explore regarding how to use the collected data to improve maintenancecapabilities, especially in key and challenging areas such as switch machinemaintenance, power maintenance, and wireless environment monitoring.

To address theissues encountered during the aforementioned practices, the Signal Branch hassystematically reviewed each problem and collaborated with design institutes,system integrators, and construction units for in-depth analysis and focusedresearch, formulating a series of implementable solutions. The researchfindings have been compiled into a collection of papers, aiming to providetargeted solutions for the overhaul and renovation teams, empower frontlineemployees involved in daily maintenance, and bridge the ′last mile′ of planningimplementation. This approach is intended to comprehensively improve thequality and efficiency of production services, support the high-qualitydevelopment of Shanghai rail transit, and contribute to the prosperity of theindustry.